Carbomethoxymethylenetriphenylphosphorane

Carbomethoxymethylenetriphenylphosphorane
Names
	Preferred IUPAC name Methyl (triphenyl-λ5-phosphanylidene)acetate
Identifiers
CAS Number	2605-67-6;
3D model (JSmol)	Interactive image;
ChEMBL	ChEMBL1715161;
ChemSpider	16508;
EC Number	220-018-4;
PubChem CID	17453;
UNII	D9MZ753Q8K ;
	InChI InChI=1S/C21H19O2P/c1-23-21(22)17-24(18-11-5-2-6-12-18,19-13-7-3-8-14-19)20-15-9-4-10-16-20/h2-17H,1H3 Key: NTNUDYROPUKXNA-UHFFFAOYSA-N;
	SMILES COC(=O)C=P(C1=CC=CC=C1)(C2=CC=CC=C2)C3=CC=CC=C3;
Hazards
	GHS labelling:
Pictograms
Signal word	Danger
Hazard statements	H301, H315, H319, H335
Precautionary statements	P261, P264, P270, P271, P280, P302+P352, P304+P340, P305+P351+P338, P321, P330, P362+P364, P403+P233, P405, P501
	Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Carbomethoxymethylenetriphenylphosphorane is a chemical compound used in organic syntheses. It contains a phosphorus atom bound to three phenyl groups, and doubly bound to the alpha position of methyl acetate. It undergoes a Wittig reaction.^[1] It is used in the Vitamin B12 total synthesis.

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